Finding the Third Proportional to 144,895.50 and 320,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,895.50 : 320,890.50 = 320,890.50 : x
2. Step 2: Convert to fraction form
   144,895.50/320,890.50 = 320,890.50/x
3. Step 3: Cross multiply
   144,895.50x = 320,890.50 × 320,890.50
4. Step 4: Simplify right side
   144,895.50x = 102,970,712,990.25
5. Step 5: Solve for x
   x = 102,970,712,990.25/144,895.50
6. Step 6: Final answer
   x = 710,655.01